10 Questions
What is the main physiological change triggered by adrenaline in response to a threat?
Increased heart rate and stroke volume
Which of the following is NOT a role of adrenaline's interaction with adrenergic receptors?
Stimulating the digestive system
What enzyme is activated by cyclic AMP in response to the binding of adrenaline to adrenergic receptors?
Kinase enzyme
Which region of the heart is known as the pacemaker?
Sinoatrial node
What does adrenaline act as in the cellular signaling process?
First messenger
What physiological change does adrenaline cause in the pupil?
Dilation
Which enzyme converts ATP to cyclic AMP in response to adrenaline binding?
Adenyl cyclase
What role does cyclic AMP play in the cellular signaling pathway initiated by adrenaline?
Activating a kinase enzyme
What is the function of the membrane-associated enzyme adenyl cyclase in response to adrenaline binding?
Convert ATP to cyclic AMP
What happens in response to the wave of electrical stimulation caused by the sinoatrial node in the heart?
Atria contract roughly simultaneously
This quiz covers the basics of hormonal communication, focusing on how hormones are secreted by endocrine glands, their specificity to target cells, and the difference between endocrine and exocrine glands. It also includes information about the location and composition of adrenal glands.
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