Which of the following processes involves the endocrine system and digestive system working together? A. Oxygen is carried to blood cells as food is digested in the stomach.
B. Hormones stimulate the pancreas to release enzymes needed to break down food.
C. The brain sends signals to the muscles to chew food.
D. When the hand touches hot food, it is quickly moved away.

Which of these substances does not protect against invaders in the nonspecific immune response? a. saliva b. mucus c. tears d. urine

Which of the following is not a possible effectof increasimg carbon dioxide levels in the atmosphere ?

Choose the incorrect statement (a) the motor end plate membrane is only capable of generating graded potentials, but it is contiguous with the skeletal muscle sarcolemma, which can generate action potentials. (b) propagation of an action potential through the t-tubules into the sarcoplasmic reticulum triggers the release of ca++ into the cytoplasm of a skeletal muscle fiber. (c) the generation of suprathreshold endplate potentials in multiple muscle fibers could be due to the increased frequency of action potential generation at the axon hillock of a single motor neuron. (d) a greater amount of ach would be found in the presynaptic vesicles of a motor unit that fired several action potentials after exposure to botulinum toxin, than in a motor unit that fired several action potentials after exposure to the venom of the krait snake (which contains α-bungarotoxin).