physio ch3

The nucleus stores all the information needed to synthesize which of the following molecules? carbohydrates lipids proteins phospholipids All of the answers are correct.

All of the answers are correct.

The cellular organelle(s) responsible for packaging and transporting proteins is/are the ribosomes. microtubules. mitochondria. Golgi complex. rough endoplasmic reticulum.

Golgi complex.

What is the name of the hollow interior of an organ? Core Sphere Cavity Lumen

Lumen

All of the following are synthesized along various sites of the endoplasmic reticulum except one. Identify the exception. proteins RNA steroids fatty acids phospholipids

RNA

________ proteins extend all the way across the cell membrane. Glycolipid Transmembrane Peripheral Cytoskeletal Nuclear

Transmembrane

Cells that store fat are called melanocytes. liposomes. fibroblasts. mast cells. adipocytes.

adipocytes

Define interstitial fluid, indicating whether it is inside or outside cells (intracellular or extracellular). Interstitial fluid is the extracellular fluid inside the circulatory system. Interstitial fluid is the intracellular fluid found in all cell types. Interstitial fluid is extracellular fluid outside the circulatory system and the cells. Interstitial fluid is the intracellular fluid of the blood cells.

Interstitial fluid is extracellular fluid outside the circulatory system and the cells.

________ is a tissue that is modified to transmit chemical and electrical signals from one cell to another. Exocrine tissue Epithelia tissue Neural tissue Endothelium Connective tissue

Neural tissue

Which two fluid compartments make up the extracellular fluid? Cytosol and plasma Interstitial fluid and intracellular fluid Intracellular fluid and plasma Plasma and interstitial fluid

Plasma and interstitial fluid

Each of the following statements concerning mitochondria is TRUE except one. Identify the exception. Respiratory enzymes are attached to the surface of the cristae. The mitochondria contain no DNA or RNA. The mitochondria produce most of a cell's ATP. The mitochondrial cristae increase the inner surface area of the organelle. The matrix of the mitochondria contains metabolic enzymes involved in energy production.

The mitochondria contain no DNA or RNA.

In which body cavity does the heart sit? Pleural cavity Peritoneal cavity Cranial cavity Thoracic cavity

Thoracic cavity

Which tissue would likely have cells with the greatest number of gap junctions? cardiac muscle bone the mucosal layer of the GI tract epidermis

cardiac muscle

The type of protein found in gap junctions is the integrin. cadherin. occludin. connexin. claudin.

connexin

If a cell lacked lysosomes, it would not be able to digest cellular wastes and bacteria. destroy H2O2. synthesize lipids. produce enzymes. transport water-soluble molecules.

digest cellular wastes and bacteria.

Cell membranes are mainly constructed from __________. nucleic acid and proteins carbohydrates and proteins lipids and proteins lipids and carbohydrates

lipids and proteins

All but one of the structures listed below are a type of cell junction. Identify the exception. gap junctions tight junctions desmosomes adherens junctions loose junctions

loose junctions

The space that is surrounded by the tissue wall of hollow organs is known as the epidural space. extracellular space. lumen. tract. peritoneal cavity.

lumen

The protein actin is associated with which of the following structures? microtubules microfilaments intermediate filaments ribosomes

microfilaments

Part A Part complete The tissue(s) that is/are considered excitable because of the ability to generate electrical signals is/are called ________ tissue. neural muscle epithelial muscle tissue and neural muscle tissue, neural tissue, and epithelial

muscle tissue and neural

Communication between the nucleus and cytosol occurs through nucleoli. nuclear pores. desmosomes. plasmalemma. sodium channels.

nuclear pores.

Each of the following is a primary tissue type except one. Identify the exception. connective tissue osseous tissue neural tissue muscle tissue epithelial tissue

osseous tissue

Cells that form a tissue are held together by __________. nucleic acids lipids carbohydrates proteins

proteins

Which of the following is NOT a molecule synthesized in the smooth endoplasmic reticulum (SER)? fatty acids steroids proteins lipids All are synthesized in the SER.

proteins

The beta cells of the pancreas produce insulin, a protein-based hormone. Which of the following organelles would be found in higher levels in the beta cells? lysosomes mitochondria ribosomes microvilli

ribosomes

Which of the following consists of a network of intracellular membranes with attached ribosomes? smooth endoplasmic reticulum rough endoplasmic reticulum nucleoli Golgi apparatus mitochondria

rough endoplasmic reticulum

Cell membranes are said to be selectively permeable. freely permeable. impermeable. actively permeable. None of the answers are correct.

selectively permeable.

Functions of epithelia include all of the following EXCEPT providing physical protection. controlling permeability. controlling absorption. storing energy reserves. producing specialized secretions.

storing energy reserves.

The term secretion refers to storage of a material, until it is time for it to leave the cell. the process by which a cell releases a substance into the extracellular space. synthesis of a protein for export from the cell. the manufacture and assembly of a material. None of the answers describe secretion.

the process by which a cell releases a substance into the extracellular space.

This junction contributes to the blood-brain barrier. anchoring junction neuromuscular junction gap junction tight junction desmosome

tight junction