This figure shows the muscles of respiration. What muscles are indicated by number 1?
A. External intercostals
B. Internal intercostals
C. Scalenes
D. Diaphragm
E. Transversus thoracis
B
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The most crucial factor determining the resting potential of a neuron is the diffusion of
A. potassium out of the cell through leak channels. B. potassium into the cell through gated channels. C. sodium out of the cell through leak channels. D. sodium into the cell through gated channels.
Here is a figure showing major body cavities and other structures. What does "A" represent?
A. Mediastinum B. Thoracic cavity C. Pelvic cavity D. Abdominal cavity E. Diaphragm
Intrapleural pressure is usually less than atmospheric pressure
Indicate whether the statement is true or false
Arterial flow to the lower limb comes from the external iliac artery
Indicate whether the statement is true or false