Of the following muscle types, which has only one nucleus, no sarcomeres, and few gap junctions?
A) skeletal muscle
B) multiunit smooth muscle
C) cardiac muscle
D) visceral smooth muscle
B
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A person with type AB blood has:
neither anti-A nor anti-B antibodies no antigens only anti-O antibodies None of the choices are corect anti-A and anti-B antibodies
Structures marked J on the skin diagram are
A) sudoriferous glands. B) smooth muscles. C) sebaceous glands. D) immature hair follicles. E) sensory receptors.
During the relative refractory period of an action potential, a larger than normal stimulus is needed to cause another action potential. This is due to the fact that ________
A) the voltage gated potassium ion channels remain open long enough to hyperpolarize the axon membrane B) the membrane is now impermeable to all ions C) the sodium potassium pump will stop working during relative refractory D) the inactivation gates on voltage gated sodium ion channels are closed
The ____________________ is a modified endoplasmic reticulum within muscle
Fill in the blank(s) with correct word