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34641_7Tests_with_answers_MCQ.pdf
HISTOLOGY, CYTOLOGY, AND EMBRYOLOGY:
TESTS WITH ANSWERS
1.CYTOLOGY
Directions: each of the following statements contains five suggested completions.
Choose the one that is best in each case.
1. Each of the following statements concerning the plasmalemma is true, EXCEPT:
A includes elementary cell membrane; B its supermembranous layer consists of glycolipids and glycoproteins; C its submembranous layer contains filaments and microtubules; D is a semi-permeable cell boundary; E is not an obligatory cell component.
2. The plasma membrane functions are as follows, EXCEPT:
A is a selectively permeable barrier; B is the site for hormone receptors; C provides cell-to-cell interaction; D is the primary protein synthesis site; E takes part in the active and passive transport.
3. Each of the following statements concerning the microvilli is true, EXCEPT:
A are plasmalemma projections; B contain microtubules; C amplify cell surface area; D form the brush border of intestinal epithelium; E contain microfilaments.
4. Each of the following statements concerning the cilia is true, EXCEPT:
A are plasmalemma projections; B contain nine peripheral doublets and the central pair of microtubules; C are not visible in light microscope; D their basal bodies are similar to centrioles; E are movable organelles.
5. The intercellular junction where ionic channels pierce the adjacent membranes is
called: A desmosome; B nexus; C tight junction; D synapse; E lateral interdigitations.
6. The disk-shaped intercellular junction where a dense plaque with filaments is
present on the cytoplasmic surface of each opposing plasma membrane is called: A desmosome; B nexus; C tight junction; D synapse; E lateral interdigitations.
7. The intercellular junction that blocks the substance access to the intercellular
space is called: A desmosome; B nexus; C tight junction; D synapse; E lateral interdigitations.
8. Each of the following statements concerning the mitochondria is true, EXCEPT:
A have a double-membrane structure; B its inner membrane infolds to form cristae; C