The esophagus is in the gastrointestinal system.
Answer the following statement true (T) or false (F)
True
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If steroid hormones must be bound to protein carriers to travel through the blood, how are they able to bind to intracellular receptors? (The protein carriers cannot diffuse through the membrane.)
What will be an ideal response?
Answer the following statements true (T) or false (F)
1. Although there are no sarcomeres, smooth muscle still possesses thick and thin filaments. 2. Muscle tone is the small amount of tautness or tension in the muscle due to weak, involuntary contractions of its motor units. 3. Single-unit smooth muscle is found in the intestines. 4. A resting potential is caused by a difference in the concentration of certain ions inside and outside the cell. 5. The effect of a neurotransmitter on the muscle cell membrane is to modify its ion permeability properties temporarily.
Which of the following is the correct simple spinal reflex arc?
A) receptor, afferent neuron, integration center, efferent neuron, effector B) receptor, efferent neuron, integration center, afferent neuron, effector C) effector, afferent neuron, integration center, efferent neuron, receptor D) effector, efferent neuron, integration center, afferent neuron, receptor
If an ionic compound formed between an element from the first column of the periodic table and another from the sixth column, you would expect the compound to include
A. one atom from each of the two elements. B. two atoms from the first-column element and one atom from the sixth-column element. C. one atom from the first-column element and two atoms from the sixth-column element. D. three atoms from the first-column element and two from the sixth-column element.