πόσον: not τί, because the uproar would be characterized by volume rather than by distinctness.
ἀναβοῆσαι: sc. as the judges of Socrates really did. Hence the repeated entreaty of Socrates, μὴ θορνβεῖτε. Cf. Apol. 30 c ἐφ᾽ οἷς ἴσως βοήσεσθε.
ἴσως κτἑ.: is, according to the sense, a decisive affirmation, though it is given unwillingly and grudgingly.
οἴεσθαί γε χρή: is not very appropriate here; it is frequently employed where the speaker answers himself, e.g. Crito 53 c καὶ οὐκ οἴει ἄσχημον ἂν φαίνεσθαι τὸ τοῦ Σωκράτους πρᾶγμα; οἴεσθαί γε χρή, Prot. 325 c.
ἐν πάσῃ ἀπορίᾳ κτἑ.: cf. Hdt. ix. 98 ἐν ἀπορίῃ εἴχοντο ὅτι ποιέωσι.
οὔτε γάρ: the corresponding member to this is ἐάν τέ τίς με κτἑ.