Cell Membrane Components Quiz
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Questions and Answers

Which hormone directly causes an increase in both blood pressure and glucose levels?

  • ADH (correct)
  • Ghrelin
  • Estradiol
  • Leptin
  • What is the main function of somatostatin released by D cells?

  • Stimulate the release of digestive enzymes
  • Increase the production of cortisol
  • Promote bone maturation
  • Inhibit digestive system functions (correct)
  • Which type of hormone is synthesized from cholesterol and does not involve a second messenger system?

  • Steroid hormone (correct)
  • Tropic hormone
  • Peptide hormone
  • Glycosidic hormone
  • What is the main function of exocrine glands?

    <p>Produce substances that travel through ducts onto body surfaces</p> Signup and view all the answers

    Which carbohydrate linkage is found in cellulose?

    <p>Beta-1,4 linkage</p> Signup and view all the answers

    What is the term for the addition of a lipid group to proteins, anchoring them to the membrane?

    <p>Liquidation</p> Signup and view all the answers

    Which process involves the addition of a phosphate group to a protein?

    <p>Phosphorylation</p> Signup and view all the answers

    What is the term for when a ubiquitin is attached to a protein for degradation by the proteasome?

    <p>Ubiquitination</p> Signup and view all the answers

    In DNA methylation, what is added to a DNA molecule to repress transcription?

    <p>Methyl group</p> Signup and view all the answers

    Which process involves covalently attaching carbohydrate groups to proteins?

    <p>Carb glycosylation</p> Signup and view all the answers

    Which type of junction prevents the leakage of small molecules and ions between adjacent epithelial cells?

    <p>Tight junctions</p> Signup and view all the answers

    Which reflex involves spreading of a baby's toes and lifting of its big toe when the sole is stimulated?

    <p>Babinski reflex</p> Signup and view all the answers

    What is the enzyme responsible for relieving the overwinding of DNA strands ahead of the DNA replication fork?

    <p>Topoisomerase</p> Signup and view all the answers

    Which cells are specialized immune cells found in the skin and mucous membranes?

    <p>Langerhans cells</p> Signup and view all the answers

    Which type of cell junction attaches cells to the extracellular matrix?

    <p>Hemidesmosomes</p> Signup and view all the answers

    What type of receptors respond to mechanical forces, vibrations, and pressure changes?

    <p>Mechanoreceptors</p> Signup and view all the answers

    Which type of junctions allow for rapid exchange of ions and small molecules between cells?

    <p>Gap junctions</p> Signup and view all the answers

    What do Cadherins mediate in terms of cell-cell interactions?

    <p>Cell adhesion</p> Signup and view all the answers

    Which type of scans reveal information about metabolic activity in the body?

    <p>PET scans</p> Signup and view all the answers

    What is the role of ADH in the body fluids like blood?

    <p>Regulating thirst and ADH secretion</p> Signup and view all the answers

    What is the role of vitamin D in calcium regulation?

    <p>Induces the secretion of parathyroid hormone (PTH)</p> Signup and view all the answers

    How do carbohydrates link together to form complex structures?

    <p>Through glycosidic linkages between monosaccharides</p> Signup and view all the answers

    In blood calcium regulation, what stimulates the release of calcitonin?

    <p>High levels of calcium in the blood</p> Signup and view all the answers

    What is the function of insulin in carbohydrate metabolism?

    <p>Promotes the conversion of glucose to glycogen for storage</p> Signup and view all the answers

    How does parathyroid hormone (PTH) affect blood calcium levels?

    <p>Enhances absorption of calcium from the intestines</p> Signup and view all the answers

    Which of the following is NOT a role played by sulfolipids in the cell membrane?

    <p>Serving as a hormone receptor</p> Signup and view all the answers

    What type of movement is the vertical diffusion described in the text related to?

    <p>Movement of molecules across the cell membrane from one leaflet to another</p> Signup and view all the answers

    Which type of enzyme moves phospholipids in only a single direction and is ATP-dependent?

    <p>Flipase</p> Signup and view all the answers

    Where are gustatory chemoreceptors primarily located?

    <p>In the taste buds of the tongue</p> Signup and view all the answers

    Which type of receptor is responsible for detecting harmful stimuli like high temperatures and tissue damage?

    <p>Nociceptor</p> Signup and view all the answers

    What is the main function of goblet cells in the respiratory tract?

    <p>Secretion of mucus</p> Signup and view all the answers

    Which type of mutation involves flipping a chromosomal segment?

    <p>Inversion mutation</p> Signup and view all the answers

    What is the main function of dendrites in neurons?

    <p>Receives action potentials from other neurons</p> Signup and view all the answers

    Which type of mutation changes a purine nucleotide to another purine or a pyrimidine nucleotide to another pyrimidine?

    <p>Transition mutation</p> Signup and view all the answers

    What is the role of Pneumocytes II in the lungs?

    <p>Produce surfactant in the lungs</p> Signup and view all the answers

    What is the function of nodes of Ranvier in neuron physiology?

    <p>Allow action potentials to travel quickly through the axon</p> Signup and view all the answers

    Which type of mutation results in insertion or deletion of bases that shift the reading frame?

    <p>Frameshift mutation</p> Signup and view all the answers

    What is the purpose of myelin sheaths around axons?

    <p>Insulate axons for signal propagation</p> Signup and view all the answers

    What happens during the release of neurotransmitter at a synapse?

    <p>Neurotransmitters diffuse into the synaptic cleft and bind to receptors on the postsynaptic membrane.</p> Signup and view all the answers

    What is the characteristic feature of axons in neurons?

    <p>Having many side branches called axon collaterals.</p> Signup and view all the answers

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