Autorhythmic cells in the SA node intrinsically fire at a rate of 90 action potentials per minute. At rest, the heart rate is lowered primarily through modulation by: O Decreased delivery of acetylcholine and increased delivery of norepinephrine Increased delivery of acetylcholine and decreased delivery of norepinephrine Cardiac contractile cells Decreased delivery of acetylcholine and decreased delivery of norepinephrine Increased delivery of acetylcholine and increased delivery of norepinephrine

Q: Write the types, location of release and function of any five neurotransmitters? briefly explain at ...

A: The chemical materials responsible for relaying an impulse through a synapse are called neurotransmi...

Q: What happens to the fluid that remains in the lungs after birth?a. It reduces the surface tension of...

A: The respiratory system develops early in the development of the foetus. It's a complicated process w...

Q: Do cells deeper into the visual system respond to MORE or LESS complex stimuli?

A: The visual system is significant for several organisms as it is accountable for their vision. This s...

Q: List and describe the three planes of the body.

A: The three planes of the body are- Sagittal plane: As if a pane of glass is dropped down the middle o...

Q: Diagram the control of thyroid hormone secretion.

A: Hormones are chemical transmitters directly released into the blood and transported to the body's or...

Q: Describe the roles of the vascular cambium and cork cambium in secondary growth

A: Introduction: Dicot roots and stems are known for their secondary growth. The formation of secondary...

Q: Write a note on homeostasis, with at least 2 fully explained examples?

A: The sum total of all chemical reactions occurring in a body is known as metabolism. To keep the body...

Q: Define cartilage

A: A tissue is a group of cells that usually have a common origin in an embryo and function together to...

Q: Describe the gross structure of a long bone and identify its parts

A: A bone is a rigid tissue that constitutes part of the vertebrate skeleton in an animal. A human adul...

Q: Just number 24 please

A: Least likely the response to the substantial blood less will be DECREASED HEART RATE . The heart rat...

Q: a) Define and explain acute response and chronic adaptation to exercises?

A: Exercise is an activity performed by the body that is responsible for increasing the level of fitnes...

Q: Why is ventricular fibrillation such a serious arrhythmia?

A: The term ‘arrhythmia refers to an abnormal condition of the heart in which the rate and frequency at...

Q: Ken has a bacterial infection with inflammation. What type of WBC increasesin number first to help h...

A: Inflammation is an important non specific defense reaction to cell injury. The hallmark signs for in...

Q: What is the importance of proteins in physiology?

A: Physiology is the research of how the human body works. It depicts the chemistry and physics behind ...

Q: What effect does atrial natriuretic hormone (ANH) haveon extracellular fluid volume?

A: The atrial natriuretic hormone is a cardiac hormone whose receptors and genes are mostly present in ...

Q: During a lethal heart attack, a blood clot lodges in the first part of the circumflex branch of the ...

A: The circulatory system involves the conduction of the blood in the blood vessels in the form of deox...

Q: Which of the following are only found in cancellous bone?a. canaliculib. Volkmann’s canalsc. trabecu...

A: Bone is the hardest tissue of the body. It supports and protects body's soft parts and helps in move...

Q: Explain how surfactant and pleural pressure preventthe collapse of the lungs and how changes in pleu...

A: The pressure that envelops the lungs inside the cavity of the pleura is known as pleural pressure. I...

Q: Explain the functions of the parts of the brainstem.

A: The brain’s region that lies between the cerebrum and spinal cord is called the Brainstem, which pla...

Q: Compare the numbers of gametes produced from one stem cell by oogenesis and spermatogenesis.

A: The mechanism by which diploid precursor cells undergo meiotic division to become haploid gametes is...

Q: What name is given to the innermost tunic of the uterus?What are the two distinct layers that form t...

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Q: Bilea. is an important enzyme for the digestion of fats.b. cannot be stored.c. is made by the gallbl...

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Q: What are the three most common metabolic disorders that cause liver damage in children?

A: Metabolism is defined as the series of biochemical reactions, occurring in the cells of an organism,...

Q: Write a summary on male reproductive system anatomy? use 150 words to write.use your own words

A: The various organs in the body of the male that function to assist the reproductive roles like produ...

Q: A blood vessel with a few smooth muscle fibers and connective tissue, and only a very thin tunica ex...

A: A blood vessel is a tube-like vessel through which blood flows. Due to the contraction and expansion...

Q: How the function of the pulmonary circuitdiffers from that of the bronchial arteries,which also supp...

A: Lungs can be defined as the type of internal and delicate organ of the body that participates in res...

Q: . How lymph is produced; characteristics oflymphatic capillaries that allow cells andother large par...

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Q: explain the significance of anatomical dead space toalveolar ventilation;

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A: The immune system comprises a special network of cells. It serves to protect the body against invadi...

Q: Discuss how autonomic reflexes help maintain homeostasis.

A: The autonomic nervous system and somatic nervous system together make the peripheral nervous system....

Q: a) Explain the role of cortisol in maintaining blood glucose level?

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Q: Dissect a cat, fetal pig, or cadaver and identify the main urinary tract organs

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Q: Define the parts and functions of the thoracic cage.

A: The thoracic cage sometimes referred to as the rib cage is the bony structure that comprises bones n...

Q: What is the process of excitation-contraction coupling in heart muscle cells?

A: Excitation contraction coupling takes place in both the skeletal muscle and cardiac muscle cells. In...

Q: summarize male reproductive systems in 150 words? use your own words to write?

A: Sexual reproduction is the process by which organisms produce offspring by making germ cells called ...

Q: When sensors in the GI tract are stimulated, they respond via reflexes. What types of digestive acti...

A: There are different reflex systems in the gastrointestinal tract which regulate the movement of food...

Q: Define Boyle’s law

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Q: Describe the basic structure of the pituitary gland.

A: The pituitary gland can be described as a small endocrine gland that plays a major role in regulatin...

Q: Give the name of the structure that the phrase describes. Primary germ layer that gives rise to epit...

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Q: What is the difference between a communicable and an infectious disease?

A: All contagious diseases are infectious but all the infectious diseases are not contagious.  Infectio...

Q: Describe diagnostic blood tests and the normal valuesfor the tests.

A: Blood is the specialised fluid of the body. It comprises 4 components, plasma, red blood cells, whit...

Q: Describe the primary functions of the stomach and how it contributes to food digestion.

A: In the human body, the motility of the ingested food, its breakdown, absorption, and assimilation is...

Q: KIF1A is a motor protein that moves toward the plus end of microtubules as a monomer. KIF1A has only...

A: A two-headed structure has been widely believed to be essential for the kinesin molecular motor to m...

Q: summarize male reproductive systems in 150 words? use your own words to write?

A: Reproduction means to duplicate. It could be a biological process by which a living being duplicates...

Q: Explain how information passes from one neuron to another.

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Q: Compare and contrast the following terms: Hydronephrosis and glomerulonephritis

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Q: In animal cells, cytokinesis is accomplished by a contractile ring containing actin. The related pro...

A: The division of the cytoplasm is called cytokinesis. In a typical cell, cytokinesis accompanies kary...

Q: Give a anatomical diagram of male reproductive system?

A: The organs of the reproductive system and the urinary system constitute the male reproductive system...

Q: Identify the four different neuronal circuits, and describe howeach one functions

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Q: Classify neurons based on structure and function.

A: Neurons are the structural and functional unit of our central nervous system. Neurons are meant to c...