A certain drug decreases heart rate by blocking a receptor on cardiac pacemaker cells. This drug probably binds to ________ receptors
A) nicotinic cholinergic
B) muscarinic cholinergic
C) alpha-1 adrenergic
D) alpha-2 adrenergic
E) beta-1 adrenergic
E
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Opening a sodium channel during the resting potential would cause sodium ions to move along an electrical gradient and along a concentration gradient
Indicate whether the statement is true or false
Monocytes
a. are the first phagocytes to exit the blood and arrive at an injured or invaded area b. swell and mature into macrophages after exiting the blood c. act as opsonins d. have all of the above characteristics e. have characteristics a and b
The premotor cortex is important in orienting the body and arms toward a specific target
Indicate whether the statement is true or false
If a student uses a parfocal compound light microscope, which of the following would be true?
A) The focus will have to be adjusted using the mechanical stage control knob. B) After the initial focus adjustments are made, the image should remain in focus as the specimen is viewed with each objective lens. C) The focus will have to be adjusted using the coarse adjustment knob. D) The focus will have to be adjusted using the fine adjustment knob.