States) N P 21. Name the effect of the following factors on heart rate: Norepinephrine (hormone or neurotransmitter) Epinephrine (hormone) Acetylcholine (neurotransmitter) Low O2 levels Ca*2 channel blocker medication Factor Channel 22. State the channels involved during an action potential in cardiac CONTRACTILE cells and then describe in which direction each ion moves across the channel when the channel fully opens. I lon? Influx or Efflux? 1. 2. 3. 4. Increases or Decreases Heart Rate? 23. Be able to draw an action potential in a cardiac CONTRACTILE cell. Include the SEP 9 O Focus

Can you please help me with these questions, please. 1. Name the enzyme that breaks down the neurotransmitter that is associated with the induction of a muscle contraction   A. Aceitic acid   B. acetylcholine   C. Acetylcholinesterase   D. ATP 2. Sensory nuclei   A. receive and relay sensory information from sensory receptors of the body to the PNS   B. both are correct   C. receive and relay sensory information from sensory receptors of the body to the CNS   D. none of the above 3. What are made of tense regular connective tissue and are responsible for attaching bone to bone.   A. Ligaments   B. veins   C. Tendons   D. small muscles

Please help me questions no 8

Health Science Question: Answer in 15 minutes no more than that-  Answer correctly and read the question correctly, I do not need an explanation to why these are the correct answer, I just would like the key answer please and thank you. If the question is done correctly, I will write a very wonderful and long review about you!