What is acetylcholine?
A) an ion pump on the postsynaptic membrane
B) a source of energy for muscle contraction
C) a component of thick myofilaments
D) an oxygen-binding protein
E) a neurotransmitter that stimulates skeletal muscle to contract
E
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In the process of phagocytosis, water is transported across the cell membrane.
Answer the following statement true (T) or false (F)
What structure contains the receptor cells for hearing?
What will be an ideal response?
Which structure lies posterior to the bladder and anterior to the rectum and secretes an alkaline, fructose filled fluid?
a) Prostate b) bulbourethral gland c) Seminal vesicles d) Spongy urethra e) Prostatic urethra
Which of the following is the last step that produces an inspiration?
a. The atmospheric pressure becomes lower than the intrapleural pressure. b. The diaphragm contracts. c. The intercostal muscles contract. d. The intra-alveolar pressure becomes lower than the atmospheric pressure. e. The intrapleural pressure becomes positive.