Which of the following is a TRUE statement about hormone signaling?
| A hormone can cause an effect in a cell without binding to its receptor. |
| Most hormone receptors interact with multiple types of hormones. |
| A hormone always causes the same effect in different cell types. |
| Interaction of a hormone with its receptor alters the activities of many enzymes in a cell. |
A hormone can cause an effect in a cell without binding to its receptor. : False. Harmones act on cells that have appropriate receptors
Most hormone receptors interact with multiple types of hormones. False Harmone recptors are specific.
A hormone always causes the same effect in different cell types. False.
Interaction of a hormone with its receptor alters the activities of many enzymes in a cell. True
Question 20 2.2 pts Which of the following is a true statement concerning hydrophilic signaling molecules? Its receptor is located in the cytoplasm of the target cell. It may trigger a signaling cascade that causes a response in the target cell. It is a steroid. After it enters the cell, it likely results in a modification of gene expression. o Its receptor typically contains a DNA-binding domain.
1)The primary function(s) of the endocrine system is/are to a. regulate fuel selection during exercise. b. produce and secrete hormones. c. control blood glucose levels. d. All of the above. 2) Hormone receptor specificity means that a. hormones can bind to any receptor to stimulate its effects. b. hormones must bind to an appropriate receptor specifically structured for that particular hormone. c. hormones can bind to different receptors to elicit different effects. d. receptors for each hormone only exist in...
A hormone is known to cause smooth muscle relaxation in blood vessels. However, it also causes contraction of cardiac muscle. What statement below would be true of this hormone? A. it acts through paracrine signalling in the heart, but the blood vessels undergo endocrine signalling B. the blood vessels have a different receptor for this hormone than the heart does C. the heart is a target cell of this hormone, but not the blood vessels D. this is not possible...
1. In paracrine signaling, the signaling molecules affects only: Target cells close to the cell from which it was secreted a. b. Target cells distant from its site of synthesis in cells of an endocrine organ Both a. and b. с. d. None of these 2. Below are listed the events that occur in cell to cell communication. Signal transduction occurs 1. 2. Plasma membrane receptor binds with a ligand A cellular response is effected 3. 4. Ligand is released...
QUESTION 44 Which one of these statments is true? Amine hormones are small peptides made up of less than 200 amino acids Steroid hormones (such as testosterone) are water soluble for direct transport in blood Steroid hormones cannot diffuse through the nuclear membrane Steroid hormones bind to cytoplasmic or nuclear receptors and the complex acts as a transcription factor QUESTION 43 Cell A और CAMP PKA Cell B GTR AT CAMP PKA Question Completion Status: CAMP PKA As shown in...
Question 1 of 10 10 Points Which of the following secretes hormones? • O A. Hypothalamus • B. Thyroid • O C. Liver • D. Appendix Reset Selection Signals from the brain and spinal cord going to muscles and glands go through • • • A. Motor neurons B. Sensory neurons C. Hypothalamus • OD. Receptors A junction between neurons through which electrical signals pass through are known as . A. Synapses B. Axons • O C. Neurotransmitter D. Myelin...
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Hormones are usually transported through and affect only cells with 1) A) intercellular junctions cell junctions C) blood vessels... specific receptors B) ducts... .specific receptors D) blood vessels... cell junctions 2) Hormones regulate 2) A) reproduction only B) growth, only C) metabolism, only D) Growth, reproduction, and metabolism are regulated by hormones. 3) Steroid hormones 3) A) usually difuse through the plasma membrane into...
1)Lipid-soluble hormones move easily through the body attached to a carrier protein to reach their destination; they also bind to receptors within the cell to activate them. Which of the following fits this description a- carbohydrate hormones b-Most biogenic amines c-Steroid hormones d-Peptide and polypeptide hormones 2) Which of the following are stimulation mechanisms that cause a gland to secrete a hormone? A) nervous system, hormonal, humoral B) enzymatic, nervous system, humoral C) nervous system, enzymatic, hormonal D) enzymatic, hormonal,...
1. Which of the following is true of the anterior pituitary but NOT the posterior pituitary? a. It is composed of neural tissue b It is controlled by the hypothalamus c. It synthesizes steroid hormones d. It synthesizes peptide hormones e. It secretes neurohormones 2. Which of the following is true of the classical model of steroid hormone action but NOT the non-classical model? a. steroids travel through the blood to reach target cells b. steroids bindto receptors inside target...
Question 1 (1 point) Vasoconstriction occurs when epinephrine (adrenaline) binds to the a-adrenergic receptor on vascular smooth muscle cells. One way to treat high blood pressure is to administer competitive inhibitors that bind to this receptor. The Kd for binding of epinephrine to this receptor is ~UM. Based on the measured affinity (Kd) of the following drugs for the a-adrenergic receptor, which might be good candidates for high blood pressure medication? Drug A: Kd = 0.6 M; Drug B: Kd...