Which type of capillary has the largest diameter?
A. Continuous capillaries
B. Venous sinuses
C. Sinusoids
D. Sinusoidal capillaries
E. Fenestrated capillaries
Answer: B
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What is the functional role of the T tubules?
A) synthesize ATP to provide energy for muscle contraction B) enhance cellular communication during muscle contraction C) stabilize the G and F actin D) hold cross bridges in place in a resting muscle
How long is the period of gestation (pregnancy) in humans from conception?
a. about 33 weeks b. about 34 weeks c. about 36 weeks d. about 38 weeks e. about 40 weeks
During oogenesis,
a. thousands of primary oocytes are formed. b. one primary oocyte yields 16 mature ova. c. one primary oocyte yields 1 mature ovum. d. each ovum contains 46 chromosomes at the time of ovulation. e. sex hormones reach their lowest levels.
Which of the following is a specialized tissue in the right atrium that acts as the heart's natural pacemaker by generating the electrical signal for the heartbeat?
A) Sinus Venosus B) Sinoatrial Node C) Atrioventricular Node D) Septa