A&P Chapter 3 Flashcards


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created 3 weeks ago by leandravillanueva
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medical, physiology, science, life sciences, anatomy & physiology
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1

The process of forming mRNA is called?

  • auscultation
  • transcription
  • replication
  • translation
  • ribolation

transcription

2
card image

What structure organize the mitotic spindle during division?

  • 5
  • 2
  • 3
  • 1
  • 6

2

3

Each triplet baes on a gene corresponds to

  • one mRNA
  • one protein
  • one DNA nucleotide
  • one amino acid in a protein
  • one chromosome

one amino acid in a protein

4

Microfilament

  • are found in the cytoplasm radiating away from the centrosome
  • interact with filaments composed of tubulin to produce muscle contractions
  • are usually composed of myosin
  • anchor the cytoskeleton to integral proteins of the cell membrane
  • are hollow, filamentous structures
  • anchor the cytoskeleton to integral proteins of the cell membrane

5

cytology

the structure and function of cells

6

many protein in the cytosol are ________ that accelerate metabolic reactions

  • carbohydrate
  • messengers
  • ions
  • enzymes
  • lipids

enzymes

7

Functions of plasma membrane include all the following except

  • separation of cytoplasm from the extracellular fluid
  • sensitivity to chemical change in the extracellular fluid
  • regulation of exchange of material with the extracellular environment
  • structural support
  • thermal insulation

thermal insulation

8

Examination of a sample of glandular cells reveals an extensive network of smooth endoplasmic reticulum. Which of the following is the likeliest product of the cells?

  • transport protein
  • digestive enzymes
  • antibodies
  • protein hormones
  • steroid hormones

steroid hormones

9

Which of the following best describes osmosis?

  • active transport of water across the cell membrane
  • diffusion of water from a greater to lesser water concentration across a selectively permeable membrane
  • random movement of water due to kinetic energy
  • movement of water into a solute
  • diffusion of water from a greater to a lesser water concentration

diffusion of water from a greater to lesser water concentration across a selectively permeable membrane

10

The functional units of DNA that contain the instructions for making one or more proteins are

  • chromosomes
  • RNA
  • ribosomes
  • genes
  • condons

genes

11

All of the following membrane transport mechanisms are passive processes except

  • osmosis
  • facilitated diffusion
  • movement of water
  • diffusion
  • vesicular transport

vesicular transport

12

If a cell lacked the enzyme DNA polymerase, it could not

  • maintain the integrity of the nuclear envelope
  • form a new nuclear membrane during telophase
  • form spindle fibers
  • link segments of DNA together
  • form complementary strands

form complementary strands of DNA during replication

13

Which of these substances could be driven across a membrane by the resting membrane potential?

  • Na+
  • CO2
  • glucose
  • H2O
  • O2

Na+

14

Embryonic stem cells might be used to replace neurons lost in Parkinson's Disease because

  • they have not yet differentiated
  • they are readily available
  • they are taken from the brain of the embryo
  • they divide quickly
  • they are young and vigorous

they have not yet differentiated

15

Which of the following descriptors regarding cytoplasm false?

  • contains less proteins then extracellular fluid
  • syrupy or gel-like consistency
  • includes cytoskeleton
  • includes cytosol
  • the material that fills a cell

contains less proteins then extracellular fluid

16

The enzyme ______ is required for the synthesis of mRNA

  • RNA polymerase
  • deoxyribose
  • RNA synthetase
  • ribose
  • phosphatase

RNA polymerase

17

when telomeres get too short after repeated cell divisions.

  • the cell dies
  • the chromosomes uncoil
  • the cell stops dividing
  • the cell divides more frequently
  • the cell become cancerous

the cell stops dividing

18

the endoplasmic reticulum is responsible for all of the following except

  • lipid synthesis
  • passing molecules to the Golgi apparatus
  • drug and toxin neutralization
  • modification of new proteins
  • housing the chromosomes

housing the chromosomes