Neurotransmitters act on their targeted receptors:     slower than hormones do.     faster than hormones do.     by using electric impulses.     by simulating other chemicals.

The propagation and reception of signals between nerve cells must happen quickly, in order for an organism to respond to stimuli appropriately. Because of that, the majority of neurotransmitters fall into which category?   -Autocrine -Paracrine -Endocrine -Direct signaling

Steroid hormones require a cell surface receptor to exert their biological effect(s)   Group of answer choices True False omit choice omit choice

Which of the following statements describes a likely effect of a drug that enhances testosterone (a steroid) binding to its receptor in human cells? The cytosolic levels of CAMP would decrease. The production of particular proteins would begin The cytosolic calcium concentration would increase. The activity of G proteins would decrease.

A hormone is said to have a _______ effect when it's presence enhances the effect of another hormone: secondary antagonistic synergistic permissive

Imagine that a new type of psychoactive drug has been developed in a laboratory. It works by slowing the reuptake of dopamine in some brain circuits, increasing the amount of dopamine in the synapse. It also blocks serotonin binding in other brain circuits. Based on only this information, you can conclude that this new psychoactive drug is a: dopamine and serotonin antagonist. dopamine antagonist and serotonin agonist. dopamine and serotonin agonist. dopamine agonist and serotonin antagonist.

Use the word bank below to answer the following questions (answers can be used more than once): endocrine nervous Which system is better to respond to the following: ignoring a constant low-level harmless stimulus (ex. a buzzing air conditioner) responding to a quick sudden threat maintaining a consistent signal response for months targeting one specific small tissue in a specific part of the body

With respect to nerve impulses, the Rising Phase is initiated by binding of neurotransmitters to ligand channels. True False

Why does smoking marijuana produce a psychoactive response? O The active ingredient in marijuana, CBD, can bind to CB2 receptors in the periphery The active ingredient in marijuana, THC, can bind to CB1 receptors in the brain O The THC molecule is structurally identical to the endogenous cannabinoid anandamide O THC is a CB1 receptor antagonist Because life is just beautiful, man.

Received information is called a transduced signal because: this process often has many steps of information conversion. it is then converted into other electrical forms. it is then converted into other chemical forms. many different molecules form a signaling cascade. it is then converted into other chemicals during metabolism.