3. Cells

Cell Structure & Theory

Cell Structure

Cell Parts Components And Their Functions

 Centrioles serve as the base of cilia and flagella and in pairs compose centrosomes. 

  Centrosomes function in microtubule assembly. 

 Smooth endoplasmic reticulum metabolizes and transports fats, synthesizes steroid-based hormones, and detoxifies cells. 

 Which of the following organelles maintains cell shape, supports cellular structures, and generates cell movements? 

 Human cells have three main parts: the plasma membrane, the cytoplasm, and the nucleus. The plasma membrane is the outer boundary of the cell. Human cells are animal cells, and they do not contain cell walls; cell walls are found in plant cells and fungi. 

 The outer boundary of a human cell is the __________. 

 The cell theory states that a cell is the basic structural and functional unit of living organisms. When you define cell properties, you are, in fact, defining the properties of life. 

 The basic structural and functional unit of living organisms is the __________. 

 The rough endoplasmic reticulum forms transport vesicles, but the transport vesicles merge with the cis-face of the Golgi apparatus and do not directly secreted their contents out of the cell. 

 The function of mitochondria is ATP synthesis. 

 The function of centrosomes is spindle microtubule assembly. 

 Which of the following organelles produces secretory vesicles? 

Cell Theory

 The Golgi apparatus packages, modifies, and segregates proteins for secretion from the cell, inclusion in lysosomes, and incorporation into the plasma membrane. 

 The nucleolus is the site of ribosome synthesis. 

 Which of the following organelles is responsible for generating most of the energy the cell uses to perform work? 

Label The Cell

 The mitochondrion transfers the energy found in nutrient molecules to ATP, the molecule that cells use to supply power for chemical reactions. 

 Lysosomes are spherical membrane-bound sacs that contain many different digestive enzymes utilized within the cell. 

 Which of the following cell structures is the largest organelle in the cell and functions as the control center of the cell? 

 Ribosomes, which can be free in the cytosol or attached to the rough endoplasmic reticulum, are the organelles responsible for protein synthesis. 

 in the cytosol and on the rough endoplasmic reticulum 

 in the nuclear membrane and on the endoplasmic reticulum 

 Which of the following organelles serves as the site of protein synthesis? 

Learn the toughest concepts covered in Anatomy & Physiology 1&2 with step-by-step video tutorials and practice problems by world-class tutors



Anatomy & Physiology

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1. Introduction to A&P

2. Chemistry

4. Tissues

5. Integumentary System

6. Bones + Skeletal Tissues

7. Skeletal System

8. Joints

9. Muscles and Muscle Tissue

10. Muscular System

11. Nervous Tissue

12. Central Nervous System

13. Peripheral Nervous System

14. Autonomic Nervous System

15. Special Senses

16. Endocrine System

17. Blood

18. Cardiovascular System: the Heart

19. Cardiovascular System: Blood Vessels

20. Lymphatic System

21. Immune System

22. Respiratory System

23. Digestive System

24. Nutrition, Metabolism, Energy Balance

25. Urinary System

26. Fluid and Electrolyte Balance, Acid Base Balance

27. Reproductive System

28. Pregnancy and Human Development

29. Heredity

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Membrane Structure

Cell Junctions

Membrane Transport

Cell Transport

Membrane Receptors

Plasma Membrane

Mitochondria

Structure and Function of Ribosomes, Endoplasmic Reticulum, and the Golgi Apparatus

Lysosomes, Peroxisomes and Cytoskeletal Elements

Cell Extensions, Microvilli versus Cilia

Cytoplasm

Nuclear Envelope, Nucleolus, and Chromatin

Phases of the Cell Cycle

 DNA Replication

Protein Synthesis, Gene and Genetic Code

Nucleus

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